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"The first edition of this work appeared in 1885, in the form of a 'Report upon the comparative merits of anthracite and bituminous coal,' to which was added in a second edition, issued in 1888, a number of analyses and tests of different kinds of coal, together with corrections to that date. A third edition was issued in 1892, omitting the discussion of the relative merits of anthracite and bituminous coal ... A fourth edition was issued in 1900 and a supplement thereto in 1905."

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